Thanks for the rapid answer. If I got it right, that icon will only change the keyboard layout while I’m log in? I need the possibility to alter the system language after login. Using the old login screen, I just selected the user. After that, there was different options in the bottom of the screen. The leftmost icon was a globe followed by option to set the system language after login. If there is no equal option in the new login screen- how can I return to the old one? Best regards Bosch
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BodozerJul 2 '12 at 6:07

Could you test this solution please? Quoting comment #16: There is now an optional language selector in the GTK greeter for desktops that require it. To enable it set show-language-selector=true in /etc/lightdm/lightdm-gtk-greeter.conf. Fixed in 0.9.8.
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medigeekJul 2 '12 at 9:27